Fixup test as required

and reduce object churn and duplication
Fixup tests, javadocs, logging as required

to save space; not stored for participating tunnels.

Preliminary, proposal not finalized, subject to change
Not yet compatibility tested with other implementations
Add peers to match requested length for explicitPeers
remove commented out code
log tweaks

never worked - didn't check result, processed own config

Fix max ID

Remove cast warnings
Fix RouterAddress.setExpiration() to match javadoc, used only by tests

Return failure codes from LCM to client (ticket #1939)

replaces i2np.udp.allowLocal and i2np.ntcp.allowLocal,
fixes test networks (ticket #1875)

- FloodfillMonitorJob:
  - Use avg of router.tunnelBacklog instead of current backlog
- Some language/spelling fixes

moved to junit years ago but not part of any tests

catch IAE from getInstance() if i2ptunnel.config isn't found
in app context; log tweaks; config command tweaks
Unit tests: Fix several NPEs in LocalClientManager,
implement HostLookup